Whats up guys...
Recently just picked up my 4th e92(All Tuned)..
2011 335 xdrive 6AT
Car is tuned with Jb4 on map 5...Bmw performance exhaust...ER chargepipe...
This car definitely feels sluggish!!!
All my other n54's would walk past a g37 with no issue at all.
A buddy of mine has a 08 g37s with Injen Intake.
I find it realllly weird that he was able to keep up with me side by side straight to 120+ (somewhere in Mexico)
I am going to guess that I have a boost leak somewhere...any ideas??

Also...the car makes a weird sound at idle and when you rev it to about 2k rpm...a squeeling sound...

Charge pipe and BMW PE aren't really performance mods per say.
The PE just changes your exhaust note, doesn't help the flow out too much.
Add into the matter that the AWD leaches more power and it's not hard to believe.

Get intake, downpipes and a full exhaust to let the JB4 do it's thing.

OP, I felt the same a few days ago on the BQE. A four door G37 kept up. I just reinstalled the Cobb after that incident and dumped the dinan S2!!! Will be dusting the G37's now as long as I fix up the damn misfires...lol

had the same problem my 335 with apr design downpipes,jb4, dual cones, was getting beaten by my friends gt mustang had to do with my vaccum lines around the diverter valves were old and worn out leaking